A Pseudo Lossless Image Compression Method
I. INTRODUCTION
Data compression methods can be reversible (error-free) or irreversible (lossy).
A reversible scheme can only achieve a aximum compression ratio of about 2.5, but will allow exact recovery of the original image from the compressed version.
This compression ratio is limited by the noise in the image which degrades the correlation between pixels.
I. INTRODUCTION(cont.)
Today, lossy compression methods are not being used by radiologists in primary di ....etc

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Archiving and Distribution of 2-D Geophysical Data Using Image Formats With Lossless Compression
Abstract
Certain types of two-dimensional (2-D) numerical remote sensing data can be losslessly and compactly compressed for archiving and distribution using standardized image formats. One common method for archiving and distributing data involves compressing data files using file compression utilities such as gzip and bzip2, which are widely available on UNIX and Linux operating systems. GZIP-compressed files and bzip2-compressed f ....etc

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Adaptive Sequential Prediction of Multidimensional Signals With Applications to Lossless Image Coding



I. INTRODUCTION
P REDICTING the future of a sequence from its past is a
common and important problem in many disciplines such
as information theory, signal processing, machine learning,
economics/finance, statistics, etc. A series of seminal papers
of Rissanen established the intimate connection between prediction
and universal source coding . In parallel to his
th ....etc

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hierarchical prediction and context adaptive coding for lossless color image compression

Abstract
This paper presents a new lossless color image compression algorithm, based on the hierarchical prediction and context-adaptive arithmetic coding. For the lossless compression of an RGB image, it is first decorrelated by a reversible color transform and then Y component is encoded by a conventional lossless grayscale image compression method. For encoding the chrominance images, we develop a hierarchical scheme that enables the use of upper, left, ....etc

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An Improved Lossless Image Compression Algorithm Loco-R

International Conference On Computer Design And Applications (Iccda )- Image Processing Java

This paper presents a state-of-the-art implementation of lossless image compression algorithm LOCO-R, which is based on the LOCO-I (low complexity lossless compression for images) algorithm developed by weinberger, Seroussi and Sapiro, with modifications and betterment, the algorithm reduces obviously the implementation complexity. Experiments illustrate that this algorithm is better than ....etc

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Hi am GEETHU would like to get details on hierarchical prediction and context adaptive coding for lossless color image compression ppt downlmad ..My friend Aathira said hierarchical prediction and context adaptive coding for lossless color image compression ppt downlmad will be available here .. Please help me.. ....etc

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hi sir
about lossless visible watermarking for video merits and demarits ....etc

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Abstract
We present an adaptive lossless video compression algorithm based on predictive coding. The proposed algorithm exploits temporal, spatial, and spectral redundancies in a backward adaptive fashion with extremely low side information. The computational complexity is further reduced by using a caching strategy. We also study the relationship between the operational domain for the coder (wavelet or spatial) and the amount of temporal and spatial redundancy in the sequence being encoded. Experimental results show that the proposed s ....etc

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Lossless Watermarking for Image Authentication (VC++)
IEE Transactions on Image Processing, Vol. 15, No. 4,

Abstract:
We present a novel framework for lossless (invertible) authentication watermarking, which enables zero-distortion reconstruction of the un-watermarked images upon verification. As opposed to earlier lossless authentication methods that required reconstruction of the original image prior to validation, the new framework allows validation of the watermarked images before recovery of the original image. This reduces co ....etc

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HIGH CAPACITY,LOSSLESS,SECURE IMAGE STEGANOGRAPHY USING WAVELETS



IMAGE STEGANOGRAPHY

Steganography means COVERED WRITING .

It s a concealed communication

Image steganography is the technique hiding a payload (message) is hided
inside cover image (carrier),to get a stego-image.

Cover image is not statistically changed.

The modern example of steganography is a microdot.

DRAWBACKS .

Drawbacks some of the commonly used transforms:

FOURIER TRANS ....etc

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